feat(telemetry): local telemetry playground using injected OTel sidecar (#342)#286

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udsmicrosoft wants to merge 3 commits intodocumentdb:mainfrom

udsmicrosoft:users/urismiley/telemetry-playground

Commits on Apr 20, 2026

feat(telemetry): re-align local telemetry playground on injected OTel sidecar
udsmicrosoft
committed

Commits on Apr 21, 2026

fix(telemetry): enable gateway OTLP metrics; address PR #286 review
udsmicrosoft
committed
docs(telemetry): drop stale 'deferred Postgres metrics' notices
udsmicrosoft
committed